August stephan



(No Model.)

A. STEPHAN AUTOMATIC GAs 0R LIGHT REGULATING ATTAGHMENT FOR BAKE OVENS.

Patented Apr. 2, 1895.

UNITED ST TES PATENT OEETEE.

AUGUST STEPHAN, OF BERLIN, GERMANY.

AUTOMATIC GAS R LIGHT REGULATING ATTAQHMENT FOR BAKE-OVENS.

SPECIFICATION forming part of Letters Patent No. 536,662, dated April 2,1895.

Application filed July 10. 1894- Serial No. 517,103- (No model.)

To all whom it may concern.-

Be it known that I, AUGUST STEPHAN, a

-. citizen of the Kingdom of Prussia, residing at Klopstock Street, 25,Berlin, in the Kingdom of Prussia and German Empire, have inventedcertain new and useful Improvements in Automatic Gas or Light RegulatingAttach ments for Bake-Ovens, of which the following is a specification.v

The object of my invention is to provide an automatic gas or lightregulating arrangement, or attachment to the door or windows of bakeovens, vaults and other similar apartments which when closed are keptdark for economic or other reasons and which are lighted when openedfrom time to time for inspection of their contents.

The invention consists in a pivoted lever of novel constructionconnected with the gas cook or button for regulating the light to eitherturn on, shut off or control the quantity of light and actuated by thedoor or window shutter when the same is opened or closed with invariableregularity as will hereinafter appear.

In the accompanying drawings-Figure 1, is a perspective elevation ofpart of the front of a bake oven with gas fixtures and m improvementattached thereto showing an opening in the wall through which the burnerarm of the gas fixture is projected, the oven door closed and the gasjet lowered, and Fig. 2, an elevation of my light regulating attachment,consisting of a pivoted cam shaped actuating lever and gas cook lever infull with a fragment of the gas fixture and door showing the gas cookand door open.

My invention is herein shown as applied to a bake oven of the usualconstruction wherein a sliding door at, having a rectangular frame I),is supported to move horizontally endwise in guides f, secured to thefront wall of the oven respectively above and below the door opening.Apin c, projecting from the upper right hand corner of the door a,actuates a peculiarly curved or cam shaped lever d, pivoted at e, to theupper guide bar f, of the door way and a pin g, engaging in a curvedslot h, in the upper end of the lever d, and secured to the free end ofthe pendent lever 2', which lever is secured to and controls a stop cockis,

- of a gas fixture 1,072, n, and serves to open the said cook it, whenthe door a, is pushed open and thus turn on "the light automaticallywhen the door is opened in order that the contents of the oven may bequickly lighted and examined during the process of baking withoutunnecessary exposure or escape of heat and when .closed to automaticallyturn down the light when it is not in use.

The lever d, is bifurcated at its lower end, one branch being a longS-shaped or ogee arm h, M, which operates in connection with the reversecurved slot h, at the upper end of lever d, to first quickly raise thelight before the dooris opened to its full length and hold the gas fullon during the full movement of the door and the other pendent arm khaving a rounded quick moving cam shaped edge which hangs down when thedoor is full open as shown in Fig. 2, and which is quickly acted upon bya pin 0, projecting from door at or near the end of its movement whenthe door is closed and raise it to the position shown in Fig. 1, to actupon the lever 2', and close the cock is, sufficiently to lower thelight within the limit of non-extinguishment.

It is self evident that the peculiar triple armed lever herein shown asapplied to a gas fixture may be used in connection with an electriclight and that the automatic gas or electric light regulating applianceis applicable to vaults and vault doors, closets and other unlightedapartments.

The gas fixture Z, m, n, is of any well known or preferred arrangement;the form shown however being preferable, and especially cooperative whenthe gas regulating device is applied to an oven front having a window orpeep hole 8, through which the burner may be projected and withdrawn andwhich may also be arranged around said opening to bring the gasregulating cock in close proximity to the sliding oven door, thus toestablish a direct connection in a simple manner with the triple armlever hereinbefore described which is actuated by the sliding door.

The form of gas fixture herein shown consists of a burner 0, and movablearms n, n, connected with each other by a joint m, and the arm it,connected with the fixed pipe Z, by a joint m, carrying a stop-cock P,which latter may be used either to regulate the amount of gas turned onat the burner or to ICO close oif the gas completely when the oven isnot in use. The jointed arms admit of the burners being projectedthrough the window opening S, of the oven wall to any required positionwithin the aperture to properly illuminate the whole or any part of theinterior of the oven when desired.

I am aware that electric lights have been turned on and off by makingand breaking the circuit or connection when a door is opened or closedand I am also aware that electric gas lighting attachments have beenheretofore employed for similar purposes, and that mechanical deviceshave been employed in various connections for raising and lowering a gasjet as with cigar lighting gas burners, and I do not broadly claim suchdevice or devices.

The novel form of the gas cock actuating levers and their combinationwith a sliding door, and the peculiar arrangement of the jointed gaspipes for projecting and adjusting the burner within the compartment,the stop cock for closing off the gas completely when not in use, inconnection with said jointed pipes and the pivoted lever connected withthe gas cook lever and actuated by the door, comprise the devices whichcarry out and embody my invention.

I claim as my invention and desire to se- 30 cure by Letters Patent- 1.An automatic gas regulating device for bake ovens and like purposescomprising gas fixtures projecting from the outside into the interior ofa compartment; a gas cook and swinging lever secured thereto and atriple armed cam lever operated upon by a projection upon the door andactuating the gas cock through its lever, substantially as described forthe purpose specified.

2. In agas regulating device connected with a sliding door, thecombination with the gas fixtures and gas cook of the lever i, pin g,and triple armed lever d, comprising an arm having a slot h, the ogeearm h, 77,2, and the cam faced arm h pivoted to the door frame, and thesliding door having a pin or projection c, for actuating said levers andregulating cock, substantially as described.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing Witnesses.

AUGUST S'FEPIIAN.

Witnesses:

M. HAUPT, CARL FR. REICHELT.

